Fix test script: To disable validation during training, It's better to set val_begin to infinite instead of val_interval. Because the logic of EpochBasedTrainLoop will call validate at the end of the last epoch. And this will not happen when self._epoch < self.val_begin.

Author: MGAMZ

tests/test_hooks/test_empty_cache_hook.py

@@ -15,7 +15,7 @@ def test_with_runner(self):
         with patch('torch.cuda.empty_cache') as mock_empty_cache:
             cfg = self.epoch_based_cfg
             cfg.custom_hooks = [dict(type='EmptyCacheHook')]
-            cfg.train_cfg.val_interval = 1e6  # disable validation during training  # noqa: E501
+            cfg.train_cfg.val_begin = 1e6  # disable validation during training  # noqa: E501
             runner = self.build_runner(cfg)
 
             runner.train()